Description
In the Quartus® II software version 5.1 SP2 and earlier, the MAX® II register power-up high feature may not work on registers that use a synchronous clear signal. All other register configurations implement power-up high functionality correctly.
This problem is fixed beginning with the Quartus II software version 6.0.
As a workaround in the Quartus II software version 5.1 SP2 and earlier, use asynchronous clear inputs in place of synchronous clear inputs.